US 2020/0142168 A1 Example 1 — Nikon / Harada
| 20 ELEMENTS / 16 GROUPS |
| f = 24–70 mm |
| F/2.8 |
| 2ω ≈ 84.4–34.4° |
| 4 ASPHERICAL SURFACES |
Inner focus: G21 (L21–L25, 5 elements) moves rearward 6.735 mm. Front element and rear group fixed during focus.
| Element | Type | Glass |
|---|---|---|
| L11 | Neg. Meniscus (1× Asph) | S-LAH60 (OHARA) |
| L12r | Asph. Resin Layer | UV-curing resin |
| L12g | Biconcave Negative | S-LAH65V (OHARA) |
| L13 | Positive Meniscus | S-NPH2 (OHARA) — HRI |
| L21 | Biconvex Positive | L-BSL7 (OHARA) |
| L22 | Positive Meniscus | L-BSL7 (OHARA) |
| L23 | Biconvex Positive | L-BSL7 (OHARA) |
| L24 | Biconcave Negative | S-LAH95 (OHARA) |
| L25 | Biconvex Positive | S-LAH66 (OHARA) |
| L26 | Biconvex Positive | S-LAH59 (OHARA) |
| L31 | Biconcave Negative | S-LAH65V (OHARA) |
| L32 | Neg. Meniscus (concave obj.) | S-PHM53 (OHARA) |
| L33 | Biconvex Positive | S-TIH53 (OHARA) |
| L34 | Biconcave Negative | L-BSL7 (OHARA) |
| L35 | Positive Meniscus | S-TIH6 (OHARA) |
| L41 | Biconvex Positive (1× Asph, ED) | Fluorophosphate crown — ASP/ED |
| L42 | Neg. Meniscus (concave img.) | S-LAH55 (OHARA) |
| L43 | Biconvex Positive | L-BSL7 variant (OHARA) |
| L44 | Biconvex Positive | S-FPL51 (OHARA) — ED |
| L45 | Biconcave Negative | S-TIH6 (OHARA) |
| L46 | Pos. Meniscus (1× Asph) | S-LAM54 (OHARA) |
Detailed analysis available in the interactive viewer above.